Hacksaw-frame.



C. H. WILLIAMS.

HACKSAW FRAME.

APPLICATION FILED net. I6. 1916.

7 Patented Nov. 6, 1917.

, [MENTOR Charles H.W|"ll|'cLm.'s,

r the tightening CHARLES H.

To all whom it maj wncemr V j 1 Be it known that I, CHARLES I-L vVmLIAMs'j, a citizen of theUnit-ed States, residing at Indianapolis, in the county of-Marion and State ofIndian'a, have invented a new and, of which the fol-.

useful llacksaw-Frame,

lowing is a specification.

a It isthe object of my invention-to provide a hack saw whicli'can readily be used in restricted places, as for instance by a hacksaw embodying my invention, with handle in section; and Fig."

2 is a back elevation of said hack saw.

The hack saw blade 10 is of the standard construction, with holes 11 at its ends. The hole 11 at the forward end of the blade 10 hooks over a pin 12 on an arm 13, which is preferably made of two telescoping parts which may be latched together in any rela-* tive position by a spring latch 14 mounted on one of said a plurality of notches 15 in the'other of such parts. The rear end of the arm 13 is provided with a socket 16which fits slidingly over an arc-shaped bar 17 which in turn is which projects a bolt 19 provided atone end with a pin 20 for projecting throughthe hole 11 at the rearjend of the hack saw blade 10 and threaded atthe other to cooperate with an internally threaded socket 21 the socket 16 is V sliding can nevertheless occur.

fixedwithin the handle 22. The arc-shaped bar 17 is prevented from turning relatively to the bolt 19, and held in the plane of the saw blade 10, in any suitable manner, as by a screw 23 mounted in the socket 18 and projecting into a keyway in the bolt 19. The curvature of the arc-shaped bar 17 is approximately withthe pin 12 as a center, so

that the socket 16 can slide along such areshaped bar as the rod 13 is turned about the pin 12 as a center; but this is sometimes only approximate, because of the possibility of change in length of the bar 13, but because made slightly loose such By this construction, the rod 13, the saw blade 10, and the arc-shaped'bar 17 are in the general form of a triangle. When there Specification of Lettersfatent.

p or under floors, and which is ad ustable for hack saw parts and taking into any of provided with'a socket 18 through otal connection wIttIAi/rs, or innmnaroms, INDIANA, assrenoza To no, ATKINS & so, or mnrenaroms, INDIANA, A oonronarron or INDIANA.

Hack aw-FRAME;

. Patented N ov. 6,, 1917.

'App1icationfi1ed October 16, 19 1s. seriaitr m'avea is plenty of mm for sw g the Socket 16 is swung out to the end of the arc-shaped bar 17, as shown in full lines, as this produces the most rigid structure. However, when the space is restricted, the rod 18 is swung to the dotted line position, thus bring ing the socket 16'close to the bolt 19, and thereby diminishing the angle of the'tri angle at the front end of thesaw blade 10 and providing an exceedingly narrow framework. ln eitherposition of the rod the socket 16 maybecramped on the arcshape'd bar 17 by screwing upthehandle 22, thus pushing the socket 18 along the bolt 19 towardthe saw blade 10 to tighten such saw blade and bind the bar 17 in the socket 16. This binding is sufiicient to'prevent slip pingui'itil the handle 22 is unscrewed.

I claim as my invention: 1. A hack saw frame, comprising an extensible rod arranged for pivotal connection to theforward end of the hack saw blade, a member arranged for connection to the rear end of the hack saw blade, and a bar mounted on said member and projecting therefrom in the plane of and behind the saw, said rod having a slidable mounting on said bar, and said bar being movable on said member lengthwise of the saw to cramp the rod and bar.

2. A hack saw frame, comprising a rod arranged for pivotal connection to the forhack saw blade, and a bar mounted on said member and projecting therefrom in the.

7 plane of and behind the saw, said rod having a slidable mounting on said bar, and said bar being movable on said member lengthwise of the saw to cramp the rod and bar,

said bar being in the form of an arc with its center approximately at the point of pivbetween the hack saw blade and the rod.

4L. hack saw frame, comprising a rod arranged for pivotal connection to the forward end of-the'hack saw blade, a bolt arranged for connectionto the rear end of the hack saw blade, a bar slidably mounted on said bolt and projecting therefrom in the plane of and behind the saw, said rod having a slidable mounting on said bar, and a handle having a screw mounting; on said bolt for forcing one end of said bar lengthwise of the bolt to tighten the-saw blade and a" handle having a screw mounting on said,

bolt for forcing one end of said bar length- V wise of the bolt to tighten the saw blade and cramp the rodand bar. Where they engage, said bar being in the form of an arcwith Copies of this patent may beo'btained for its center approximately at the point of pivotal connection between the hack saw blade andtherod. j

6. A hack saw frame, comprising a rod arranged for pivotal connection to the for- Ward end of the hack saw blade, a member arranged for connection to the rear end of the hack saw blade, and a bar mounted on said. member and projecting therefrom in the plane of and behind the saw, said rod and said bar being, adjustably interconnected so that vvith' the hacksavv blade they form an approximately triangular figure With a variable-angle between the hack saw blade andthe rod, and With the saw in operative condition for these different angles, and said bar being movable on said member lengthwise ofthe saw blade'to tighten the latter for different adjustments of said rod andbar. c l

I In 5 itness whereof,v I have hereunto set -my hand at Indianapolis, Indiana, this 12th day ofilOctober, A. D. one thousandnine hundred and sixteen. I

CHARLES H. WILLIAMS.

five cents each, by addressing the Commissioner of Patents. -Washington, D.Q. 

